Electric switch.



ELECTRIC SWITCH. APPLICATION HLED OCT. 8,1906. RENEWED OCT. 23, 1 913- 1,222,714.

Patented Apr. 17, 1917..

2 SHEETS-SHEET 1.

G. BAEHR. ELECTRIC SWITCH. APPLICATION FILED 061. 8.1908. RENEWED QCT.29.1!H3.

1,222,714. Patented Apr. 17,1917.

2 SHEETS-SHEET 2.

UNITED sTATEs PATENT OFFICE.

GEORGE EAEHE, or "MoKEESPORT, PENNSYL ANIA, AssIGNoE To CUTLER-HAMMER .MFG. co, or MILWAUKEE, wrsoonsntg n CORPORATION OF WISCONSIN.

ELECTRIC SWITCH.

Patented Apr. 17, 1917.

Application filed October 8, 1908, Serial No. 456,742. Renewed- October 29, 1913. Serial No. 798,136.

To all whom it may concern:

Be it known that I, (lEoRoE BAEi-IE, a citizen of the United States, residing at Mo- Keesport, in the county of Allegheny and State of Pennsylvania, have invented new and useful Improvements in Electric Switches, of which the following is a full,

clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

My invention relates to improvements in electric switches or contact-01's.

One object of my invention is to providea switch or contactor which will be compact 1n structure, durable and eflicient 1n opera tion.

A further object is to provide a switch of Figure 1 is a front elevation of the switch,

and

Fig. 2 is a vertical sectional view taken therethrough.

, The several parts of the switch are carried by a frame which is preferably cast and is provided with a hollow rectangular portion 1, and two upwardly extending parallel side pieces 2. Extending laterally from the rectangular portion 1 ofthe frame are two lugs 33, and extending laterally from the side pieces 22 are lugs 44. The lugs 3 and 4 provide means whereby the frame may be bolted, or otherwise secured to a suitable supporting panel 5. Mounted within the rectangular portion 1 of theframe, is an electromagnetic winding 6. The winding 6 is preferably wound upon a fiber tube 7 which is provided at its ends with annular flanges 8 -8. The winding- 6 is held in place by a core or plug 9 which extends through an orifice in the top of the '50 rectangular portion 1 of the frame and fits within the fiber tube 7. The core or plug 9 is provided at its end. with an annular flange 10 which rests upon the top of the frame 1. The flange 10 is recessed to receive an elastic buffer 11. Mounted within the fiber tube 7, and arranged to slide freely therein, is a plunger 12 which carries at its upper end a rod 13 of non-magnetic material. The rod 13 extends through the plug 9 and. carries, adjacent to its upper end, a flange or collar 14 which is adapted to bear against the elastic buffer 11 to limit the downward movement of the plunger 12. The upper end 15 of the rod 13 is rounded and works in a cup-shaped recess in a hearing block 16, set into the underside of the contact arm 17. Set into the upper side of the switch arm 17, adjacent to its rear end, is a bearing block 18, the bearing face of. which is. curved and is adapted to bear against a pin 19, supported between the side pieces 2 ofthe frame. Secured tothe front of the rectangular portion 1 of the frame by screws 21, is an insulating block 20 preferably formedof fiber. Secured at one end to an eye-bolt 22 on the fiber block 20, and at its other end to an eye-bolt 23 on the for- 1 This arrangement provides an open bearing for the switch arm 17, and consequently, the switch arm will require little or no luhrication'. The upright pieces 2 of the frame carry inwardly extending projections 25 between which the switch arm 17 is free to more vertically, but which prevent lateral movement thereof. Adjacent to its rear end, the arm 17 is provided with a binding-post 26 to which is secured one end of the con-- ductor 27. The opposite end of the conductor 27 is secured to a binding-post 28 carried by the frame and suit-.ilily insulated therefrom. 'The binding-post 28 forms one terminal of the switch. The arm 1-7 carries a main contact plate 29 which is preferably secured thereto byscrew s 30. At its forward end, the arm 17 'is provided with bifurcated portions 31 which are curved to form a ring. Passing through the ends of the bifurcated portions 31 is a screw 32, the purpose of which will be hereinafter explained. The ring formed by the bifurcated g V gaaeme 3 1 adapted ta receive a suitable instrument tact 57 to yieid under the pressure of the fer turning" same to raise or lower it on the 'arcingcontact 33; yet it tends to force the arm 17. When the contact 33 has been carbon contact firmly into engagement with proper y adjusted, the bifurcated portions the arcin 'contact. The desired pressure 31 are drawn together by means of thescrew between t ese contacts may be obtained by 70 32 to'firmly clamp said contact. Mounted adjusting the arcing contact on the' arm 17 in inclined rooves or guides 35, provided and by adjusting the-plug 4:9 in the cylinder in the uprigiit members 2 of the frame, is an 47. Secured to the front of the insulating A insulating block 36. The block 36 is preferblock 20, by bolts 60, are pole-pieces61 of m ably formed of fiber and is held in place a blow-out coil 62. The pole-pieces 61 ex- 7 by means of a bolt 37 which passes 'theretend upwardly on opposite sides of the arcthrou'gh and also through the upright pieces ing contacts 33 and 57. Theupper ends of f the frame. The bolt 37 is held in place the pole-pieces 61 form polar faces between by nuts 38. Secured to the upper face of which runs the magnetic flux produced by 15 the block 36 by bolts 4:0 is a frame 39 which the blow-out coil 62. Between these polar I is provided with a brush holder 41 and two faces is arranged an insulatingchute or barforwardly extending arms 42. The frame rier, which comprises side-pieces 63 and a 39 preferably comprisesabrass casting. The connecting piece 6& which is arranged parbrush holder 11 preferably comprises a yoke allel to the magnet 62. The side-pieces 63 5m in which ismounted acontact brush e3. The shield the arcing contacts from the polar brush 13 preferably comprises a plurality faces and are secured to the horizontal'piece of laminations so arranged that the ends 64 which is supported on rods passing thereof will be engaged by the main contact through the pole-pieces 61. Passing through plate 29 on the switch arm 17 when the the lower ends of the pole-pieces 61 is a bolt same is raised to the position illustrated. In 66 which carries the core 67 of the blow-out terposed between the brush 43 and the yoke coil. Between the blow-out coil and the 11 suitable clamping plates 14: against core 67 is interposed an insulating tube 68 which bears the end of a set-Screw 45 which and between the ends of said coil and the .holds the brush in place. The set-screw e5 pole-pieces are interposed insulating disks 50 provides means whereby the brush maybe 69. One end of the blowout coil 62 is seproperly adjusted in the holder to insure cured and electricall connected by bolts 70 a good eontact with the main contact plate to one side at the nine 39 which carries on the arm 17. With this arrangement the the main contact 43 and which is electrically brush 13 may be reversed when one end of connected to the carbon contact 57. The opthe same becomes worn out. The set-screw e ite end of the blow'out coil is secured in 45 carries a jam-n t46 which is adapted. to a terminal block 71 by screws 7 2. The terbe forced against the top of the brush holder, minal block 7 is secured to the front of to prevent said sets e from loo ening. the fiber block so by screws 73. The heads The extensi n :2 Of @3116 frame 39 m of the screws 73 are preferably counter- 40 i a g adapted to e ive a sunk in the terminal block 71. The terminal if 4 cylinder 47 is internally screw-threaded to the switch members the same is removed 11 "cylinder 47. Extendingthrough the ends block 71 may: be provided with a bindingof the extensions 12 is a screw 48 by means p051: o may be connected by a conducting of which the cylin r 4 m y be firmly bar to the terminal block of another switch. clamped between the extensions 12. The By arranging the blow out coil beneath receive a screw-threaded plug 49. Mounted from the path of the are which has a ten- .within the cylinder 47 is a piston 50 prod n y m ext nd upwardly. vided with a partially screw-threaded stem The rectangular portion 1 of the frame is 51 tt hp gh all Orifice in the provided with a downwardly projecting ex- 5ep 1g Mollnted p the j h tension 74 to which is secured, by bolts 75, ortion of the stem 50 are a pair of nuts 52 an i l ti bl k 76, P j ti f between whi h iS clamp d n en of 0011- wardly from the insulating block 76 are four ductOr 58- The ppos t 11 of h 6011- studs 77 which are provided at their ends ductor 58 is secured by a bolt 59 to one of with contact portions 7 8. The rear ends of 55 extensions 4 h frame h the studs 77 which pass through the insudersidecof the plunger 50 is recessed to relating block 76 are screw-threaded and carry ceive a carbon cgntact block 57 adapted to nuts 7 9 which bear against the rear face of be engaged by the arcing contact 33 carried the insulating block and secure said studs by the switch arm 17. The downward more thereto. The studs 77 are arranged in pairs, cc mcflt 0f the plunger 50 is linnted by an one pair being arranged directly beneath the internal head 56 on the eyiinder 47. Inter other. The plunger 12 carries a downpesed between the pine r 56 and the plug wardl'y extending tail rod 80. liiounted on as is a coil spring 53 wh 1 tends to farce the the tail rod 86 is an insulating tube 81. At phiuger and car-hen contact downwardly. opp-csite ends'cit the tube 81 are annular ine the spring 53 the carhcncensnlating dishs 82. The tube 81 is retained 1313 "Wai '40 tion of the frame.

on the tail rod 80 by a nut 83. Mounted on while the upper disk 84 will electrically con-' nect the-upper pair of studs 77 when the plunger 12 is raised The switches just described are adapted 15 to control auxiliary circuits. For instance,

they may be employed to cut in a resistance in series with the winding 6 when the; switch is closed, "or may be employed to control the circuit of the operating winding of another switch. r d

The various parts of this contactor may be readily removed and replaced. For instance, to remove the arm 17, it is only necessaryvto detach the conductor 27 and the. spring 24'therefrom,-remove the 'pin 19 and then pull said arm' straight out; By removing-the rod 37 and disconnecting the terminal of the blow-out coil the insulating block 36 is permitted toslide freely in the 30 grcoves of the frame and may be readily withdrawn therefrom, thereby removing the frame 39 bodily. After the switch arm'and the insulating block 36 have been removed, the nut 83- may be detached from the tail "85 rod 80 of the plunger 12 and then said plunplug 9 withdrawn vertically ger and the from the winding 6. -As soon as 'the' plunger and plug have been withdrawn, the Winding '6 may be removed from the rectangular por- The parts may be as {easily assembled by replacing the same in an inverse order to'that 'ust described.

Having thus descri (I myinvention whatl-- I claim as new and desire to secure by Inttom Patent is:

' 1. In an electric switch, the com ination with a frame having parallel upwardly extending portions, an insulating block supported between said upwardly extending ..0 portions of the frame and detachably secured thereto, a stationary contact carried 3 by said insulating block, a switch arm ar-' ranged between said upwardly extending portions of the frame and adapted to engage said stationary contact, and an electromagnetic winding mounted in said frame beneath said switch and having a plunger for actuati g said switch.

'2. In an electric switch, the combination with a frame having a pair of parallel upwardly extending portions, of an insulating block fitting in grooves in said upright portions of said frame, means for securing said insulating block in p ace, contacts carried by said insulating bloc a switch arm arranged.

tween the parallel members of said frame between said upright portions of said frame and adapted towbe moved into engagement with saidstationary contact, and an elec-.

tromaglnetic winding mounted in said frame, beneat said arm, and having-a movable 7g plungerfor actuating said arm. 3. n anelectric switcln the combination with a frame-having a pair of parallel upwardly extending members, of an insulating block fitting in grooves in said members, detachable means securing said insulating block in position, a laminated main contact and a carbon-contactcarried by .said insulating-block, a switch arm arranged be- 8O and carrying contacts adapted to engage the.

contacts; carried by, sa-id'insulating block, I

and an electromagnetic winding mounted in said frame for actuating said switch arm. L In an-electric switch, the combination with a frame having a pair of upright n1embers, of an insulating block fitting in grooves in said members, detachable means for securing. .said block in position, a contact holder carried by'said block, a reversible. laminated main contact adjustably mounted in said holder, a switch arm arrangedbetween the'upright members of said frame, and an electromagnetic winding mounted in said frame for actuating said switch arm. 5. In an electric switch the combination with a frame having two. parallel upright members, of'a switch arm arranged between v said upright members, a pivot for said. switch arm supported by said upright members, said switch armhaving a notched portion for engagin mounted in said rame and ha'ving a mov- :able core engaging said switch. arm intermediate-of its ends, the end of said. core being rounded and fittings-into a rounded recess in said switch arm, means for holding the notched portion 'of said switch arm in engagement with said pivot,contacts'cararranged above said switch arm-and detach-.v ably secured to the upright members of said frame, and contacts carried" by. said I insulating" block and arrangedto beengaged by-the contacts carried by said switch arm. 115 6. In an electri'c'switch, the combination with a frame having a pair of parallel up,-' right members, an insulating block fitting in grooves. in said upright members of said frame, detachable means for securing said 120 insulating block in position, a mainv con tact and an arcing contact carried bysa'id insulating block, a switch-arm arranged between the upright members of said frame, a

pivot supportedby said upright members 125 10o id pivot, a'solenoid ried by said switch arm,.an insulating block 11 v for maintaining the 'ndtchedportion, of-sa-id switch arm in engagement with said pivot, and contacts carried by said switch arm' for engaging the contacts carried by said insulating block.

7. In an electric switch, in combination, a supporting frame, asolenoid mounted within said frame, a switch arm. supported by said frame above saidisole'noid and adapted to be actuated-thereby, a relatively stationary contact arranged above and adapted to be engaged bv said switch arm. a horizontally disposed blow-out magnet mountedion scribed my name'in the presence of two witnesses.

GEORGE BAEHR. Witnesses I F. H. Maxsrnsrn, Tnos. R. WA'rsox.

arm andsaid eta-- said frame below said switch and; vertically 

